| Tail Number / N-Number | N6171M |
| Manufacturer | AEROVODOCHODY |
| Model | L-29 DELFIN |
| Year Built | 1966 |
| Manufacturer's Serial Number | 691942 |
| Aircraft Type | Fixed wing single engine |
| Category | Land |
| Builder Certification | Not Type Certificated |
| Number of Seats | 2 seats |
| Weight Class | CLASS 1 (Up to 12,499 pounds gross take off weight) |
| Engine Manufacturer | MOTORLET |
| Engine Model | M-701C |
| Engine Type | Turbo-jet |
| Number of Engines | 1 engine |
| Horsepower | 1,960 hp (1,462 kW) |
| Type of Registrant | Individual |
| Owner Name | NIKODEM JAMES E |
| Street | 736 SILK OAK LN |
| City | CRYSTAL LAKE |
| State | IL |
| Zip Code | 60014-4592 |
| Region | Great Lakes |
| County | McHenry County |
| Country | US |
| Fractional Ownership | No |
| Airworthiness Classification | Experimental |
| Airworthiness Date | 2017-09-07 |
| Certificate Issue Date | 2017-09-19 |
| Last Action Date | 2020-04-13 |
| Expiration Date | 2027-09-30 |
| Status | Valid Registration |
| Mode S Code | 52005506 |
| Mode S Code Hex | A80B46 |
Deregistered Aircraft 1 of 1. This aircraft was previously assigned the N-number N6171M.
| Tail Number / N-Number | N6171M |
| Manufacturer | MAULE |
| Model | M-5-235C |
| Manufacturer's Serial Number | 7180C |
| Aircraft Type | Fixed wing single engine |
| Category | Land |
| Builder Certification | Type Certificated |
| Number of Seats | 4 seats |
| Weight Class | CLASS 1 (Up to 12,499 pounds gross take off weight) |
| Number of Engines | 1 engine |
| Average Cruising Speed | 108 miles per hour |
| Type of Registrant | Individual |
| Owner Name | SANDBERG WILLIAM CRAIG |
| Street | 17445 SW 180 AVE |
| City | PERRINE |
| State | FL |
| Zip Code | 33187 |
| County | McHenry County |
| Country | US |
| Certificate Issue Date | 1991-12-17 |
| Last Action Date | 1994-12-21 |
| Last Status | The Triennial Aircraft Registration form was mailed and has not been returned by the Post Office |
| Cancellation Date | 1995-03-20 |